Title says it boys! I’ve been throwing dry fertilizer all 4 applications. (Yes I have a very short lawn season here in Nebraska) Been using a 15-0-0 with .20% Merit for grub prevention which had been working very well on the grubs! However, the Nitrogen with NO other micros isn’t doing enough for the lawns. I’m about 80% Kentucky Blue, and some fescue. All cool season very thick turf, 98% of my customers have underground irrigation. But our are is low on iron and sulfur, especially iron! Also, what kind of options do I have for liquid fertilizers?? Any tips or ideas welcome.